A treatise on zoology . y the proliferation from plates 20-24 of alternating seriesof plates, in which every other plate bears a brachiole {Schizocystis,Glyptocystis, Lepadocystis, Callocystis, SpJiaerocystis, Lepadocrimis, Pseiido-crinus); the atrophy of the anterior groove (partially in Glyptocystis, moreso in Pnmocystis and Schizocystis, wholly in Lepadocrinus, SpJiaerocystis,and Strohilocystis); atrophy of two side grooves in addition {Schizocystis,Pseudocrinus, Pleurocystis) ; restriction of pectinirhombs to suturesbetween 1 & 5, 14 & 15, and 12 & 18 {Pnmocystis^ Schizocystis, Pseudo-crin
A treatise on zoology . y the proliferation from plates 20-24 of alternating seriesof plates, in which every other plate bears a brachiole {Schizocystis,Glyptocystis, Lepadocystis, Callocystis, SpJiaerocystis, Lepadocrimis, Pseiido-crinus); the atrophy of the anterior groove (partially in Glyptocystis, moreso in Pnmocystis and Schizocystis, wholly in Lepadocrinus, SpJiaerocystis,and Strohilocystis); atrophy of two side grooves in addition {Schizocystis,Pseudocrinus, Pleurocystis) ; restriction of pectinirhombs to suturesbetween 1 & 5, 14 & 15, and 12 & 18 {Pnmocystis^ Schizocystis, Pseudo-crinus, Lepadocrinus, Callocystis). None of these characters can be takenas a basis of classification ; each group so formed would include generavery diverse in other respects ; doubtless the same structures have inmany cases been independently attained. Happily certain relationshipsseem clear, and round them the genera may be gathered into 1, Echinoencrininae, passes from the simple form.
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishe, booksubjectzoology
